diff options
Diffstat (limited to 'source/blender/draw/engines/overlay/shaders/edit_mesh_geom.glsl')
-rw-r--r-- | source/blender/draw/engines/overlay/shaders/edit_mesh_geom.glsl | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/source/blender/draw/engines/overlay/shaders/edit_mesh_geom.glsl b/source/blender/draw/engines/overlay/shaders/edit_mesh_geom.glsl new file mode 100644 index 00000000000..92252bbd223 --- /dev/null +++ b/source/blender/draw/engines/overlay/shaders/edit_mesh_geom.glsl @@ -0,0 +1,88 @@ + +layout(lines) in; +layout(triangle_strip, max_vertices = 4) out; + +in vec4 finalColor[2]; +in vec4 finalColorOuter[2]; +in int selectOveride[2]; + +flat out vec4 finalColorOuter_f; +out vec4 finalColor_f; +noperspective out float edgeCoord_f; + +void do_vertex(vec4 color, vec4 pos, float coord, vec2 offset) +{ + finalColor_f = color; + edgeCoord_f = coord; + gl_Position = pos; + /* Multiply offset by 2 because gl_Position range is [-1..1]. */ + gl_Position.xy += offset * 2.0 * pos.w; + /* Correct but fails due to an AMD compiler bug, see: T62792. + * Do inline instead. */ +#if 0 + world_clip_planes_set_clip_distance(gl_in[i].gl_ClipDistance); +#endif + EmitVertex(); +} + +void main() +{ + vec2 ss_pos[2]; + + /* Clip line against near plane to avoid deformed lines. */ + vec4 pos0 = gl_in[0].gl_Position; + vec4 pos1 = gl_in[1].gl_Position; + vec2 pz_ndc = vec2(pos0.z / pos0.w, pos1.z / pos1.w); + bvec2 clipped = lessThan(pz_ndc, vec2(-1.0)); + if (all(clipped)) { + /* Totally clipped. */ + return; + } + + vec4 pos01 = pos0 - pos1; + float ofs = abs((pz_ndc.y + 1.0) / (pz_ndc.x - pz_ndc.y)); + if (clipped.y) { + pos1 += pos01 * ofs; + } + else if (clipped.x) { + pos0 -= pos01 * (1.0 - ofs); + } + + ss_pos[0] = pos0.xy / pos0.w; + ss_pos[1] = pos1.xy / pos1.w; + + vec2 line = ss_pos[0] - ss_pos[1]; + line = abs(line) * sizeViewport.xy; + + finalColorOuter_f = finalColorOuter[0]; + float half_size = sizeEdge; + /* Enlarge edge for flag display. */ + half_size += (finalColorOuter_f.a > 0.0) ? max(sizeEdge, 1.0) : 0.0; + +#ifdef USE_SMOOTH_WIRE + /* Add 1 px for AA */ + half_size += 0.5; +#endif + + vec3 edge_ofs = vec3(half_size * sizeViewportInv.xy, 0.0); + + bool horizontal = line.x > line.y; + edge_ofs = (horizontal) ? edge_ofs.zyz : edge_ofs.xzz; + +#ifdef USE_WORLD_CLIP_PLANES + /* Due to an AMD glitch, this line was moved out of the `do_vertex` + * function (see T62792). */ + world_clip_planes_set_clip_distance(gl_in[0].gl_ClipDistance); +#endif + do_vertex(finalColor[0], pos0, half_size, edge_ofs.xy); + do_vertex(finalColor[0], pos0, -half_size, -edge_ofs.xy); + +#ifdef USE_WORLD_CLIP_PLANES + world_clip_planes_set_clip_distance(gl_in[1].gl_ClipDistance); +#endif + vec4 final_color = (selectOveride[0] == 0) ? finalColor[1] : finalColor[0]; + do_vertex(final_color, pos1, half_size, edge_ofs.xy); + do_vertex(final_color, pos1, -half_size, -edge_ofs.xy); + + EndPrimitive(); +} |